The Bollman Truss design for railroad bridges first appeared in 1850. It is an iron bridge in which rods
imbedded in masonary piers support the structure. This is NOT a heavy duty bridge. Engines were limited to light weight 4-6-0's
to 2-8-0's or smaller with 4-4-0's being the most common. This is a 4 truss section bridge.